Dual-mode sapphire loaded cavity microwave oscillator with a frequency divider in temperature control loop

This paper develops the effective method of sapphire loaded cavity (SLC) microwave oscillator frequency stabilization proposed two years ago [1]. The method uses the dual-mode temperature frequency control based on two orthogonal "whispering gallery" (WG) modes and differs from similar approaches by applying of output microwave frequency division to form a control signal. The desired resonant spectrum is provided by selecting a WGE-WGH modes\´ pair via 3D FE electrodynamic simulation. Main attention is paid to the case of the 1:2 SLC resonant frequencies\´ ratio.